Alloy 28 (UNS N08028, W. Nr. 1.4563) is a nickel-iron-chromium alloy with additions of molybdenum and copper. It has excellent resistance to both reducing and oxidizing acids, to stress-corrosion cracking, and to localise attack such as pitting and crevice corrosion. The alloy are especially resistant to sulphuric and phosphoric acid. Used for chemical processing, pollution control equipment, oil and gas well piping, nuclear fuel reprocessing, acid production and pickling equipment.
| C | Si | Mn | Cr | Mo | Ni | Cu | S | P | Fe | N | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| alloy 28 | Min % | 26,0 | 3,00 | 30,0 | 0,60 | balance | ||||||
| Max % | 0,03 | 1,0 | 2,50 | 28,0 | 4,00 | 34,0 | 1,40 | 0,030 | 0,030 | balance | ||
| ASTM B 668 (S 080289 (Alloy 28) | ||||||||||||
| 1.4563 | Min % | 26,00 | 3,00 | 30,00 | 0,70 | |||||||
| Max % | 0,02 | 0,70 | 2,00 | 28,00 | 4,00 | 32,00 | 1,50 | 0,010 | 0,030 | 0,110 | ||
| (Key to steel 2010) | ||||||||||||
| 1.4563 | Min % | 26,00 | 3,00 | 30,00 | 0,70 | |||||||
| Max % | 0,02 | 0,70 | 2,00 | 28,00 | 4,00 | 32,00 | 1,50 | 0,010 | 0,030 | 0,110 | ||
| (Key to steel 2010) | ||||||||||||
| Property | Value |
| Density: kg/dm3 | 8,0 |
| Hardness: HB | <=215 |
| polishable | yes |
| Temperature T °C/F (°C/F) |
Specific heat J / kgK (Btu / lb °F) |
Thermal conductivity W/mK (Btu·in / ft2·h·°F) |
Electric resistance µΩ · cm (Ω circ mill / ft) |
Modulus of elasticity kN/mm2 (103 ksi) |
Expansion rate from 70°F bis T 10-6 / K (10-6 / °F) |
|---|---|---|---|---|---|
| 20 / 68 | 450(--) | 12 (--) | 1,0 (--) | 197 (--) | |
| 100 / 212 | 15,8 (--) | ||||
| 200 / 392 | 16,1 (--) | ||||
| 400 / 752 | 16,9 (--) | ||||
| 500 /932 | 17,3 (--) |
| Temperature | 0,2 % Yield strength in high temperatures |
1,0% Yieldstrength in high temperatures |
Tensile strenght in high temperatures |
|---|---|---|---|
| °C / °F | Rp 0,2 | Rp 0,2 | Rm |
| N/mm2 / ksi | N/mm2 / ksi | N/mm2 /ksi | |
| 50 / 122 | 200 / 29 | 200 / 29 | 485 / 70,3 |
| 100 / 212 | 190 / 27,5 | 190 / 27,5 | 460 / 66,7 |
| 200 / 392 | 160 / 23,2 | 160 / 23,2 | 430 / 62,3 |
| 300 / 572 | 150 / 21,7 | 150 / 21,7 | 400 / 58,0 |
| 400 / 752 | 135 / 19,6 | 135 / 19,6 | |
| 500 / 932 | 120 7 17,4 | 120 7 17,4 | |
| ksi value calculated | |||
| 0,2% Yield strength (Mpa / ksi) | <214 / <73 | |
| Tensile strength (Mpa/ ksi) | <500 /<73 | |
| Elongation % | 40 | 2 in(50,88mm) |
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Application area |
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Operation temperature |
ºF to 662 ºF |
admitted operating temperature |
|
Solution heat treatment |
|
|
Working temperature |
1958 ºF to 2102 ºF |
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Explanation report |
cool down: air ;water |
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Solution heat treatment |
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|
Working temperature |
1562 ºF to 2102 ºF |
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Explanation report |
cool down:air |
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Standards |
Desciption |
|
ASTM B 668 |
Standard Specification for UNS N 08028 Seamless Pipe and Tube |
|
ASTM B 709 |
Standard Specification for Iron-Nickel-Chromium-Molybdenum Alloy (UNS N08028) Plate,Sheet and Strip |
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DIN 10216-5 (11/2004+B1) |
Seamless steel pipes under compression load Pipes made from stainless steel |
|
DIN EN 10088-3 (09/2005) |
stainless steels.Technical delivery conditions for semi-finished products,bars,rods,wire selection and bright products of corrosion resisting steels for general and construction purposes |
|
DIN EN 10217-7 |
Welded steel pipes under compression load Pipes made from stainless steel |
|
DIN EN 10297-2 (02/2006) |
Welded circular steel pipes for machine construction and general technical service stainless steel. Pipes made from stainless steel |
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